set_leave_callback

Description:

public void set_leave_callback (owned TaskThreadFunc leave_func)

Call leave_func when the task function of this is left.

user_data will be passed to leave_func and notify will be called when user_data is no longer referenced.

this	The Task to use
leave_func	a TaskThreadFunc
notify	called when `user_data` is no longer referenced
user_data	user data passed to `leave_func`